Confirming rumors that have been floating around for months, both Dave Grohl’s Sound City Players and Justin Timberlakehave been added to this year’s SXSW lineup. Grohl’s Players—including Stevie Nicks, John Fogerty, Rick Springfield, Corey Taylor, Alain Johannes, Rage Against The Machine’s Brad Wilk, and Fear’s Lee Ving—will play Stubb’s Wednesday, March 14.

Timberlake’s appearance is still a little more shrouded in secrecy. According to Austin’s KVUE, the singer is booked to play a private party sometime during the event, though Austin police have also heard rumblings about yet another surprise performance—one for which they're preparing "extra security," which doesn't at all suggest it could turn into a massive riot.